[INFO] cloning repository https://github.com/martinvonz/jj
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/martinvonz/jj" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmartinvonz%2Fjj", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmartinvonz%2Fjj'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a3de39a35ad0399fcb984fed0fb828b3a2887828
[INFO] testing martinvonz/jj against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmartinvonz%2Fjj" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/martinvonz/jj on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/martinvonz/jj
[INFO] removed workspace from git repo https://github.com/martinvonz/jj
[INFO] removed path dependency jujube-lib from git repo https://github.com/martinvonz/jj
[INFO] finished tweaking git repo https://github.com/martinvonz/jj
[INFO] tweaked toml for git repo https://github.com/martinvonz/jj written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/martinvonz/jj already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /workspace/builds/worker-8/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ca01139aa22575491d50e2ebea8f594177db6e18c1e3fb2f36cb3b8d7311ba9d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ca01139aa22575491d50e2ebea8f594177db6e18c1e3fb2f36cb3b8d7311ba9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca01139aa22575491d50e2ebea8f594177db6e18c1e3fb2f36cb3b8d7311ba9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca01139aa22575491d50e2ebea8f594177db6e18c1e3fb2f36cb3b8d7311ba9d", kill_on_drop: false }`
[INFO] [stdout] ca01139aa22575491d50e2ebea8f594177db6e18c1e3fb2f36cb3b8d7311ba9d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6544870b80b5b962f610c3507d67c83e8d1f751765f189e92cf1b9ad665a9e0d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6544870b80b5b962f610c3507d67c83e8d1f751765f189e92cf1b9ad665a9e0d", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]    Compiling protobuf v2.20.0
[INFO] [stderr]    Compiling zstd-safe v3.0.0+zstd.1.4.8
[INFO] [stderr]    Compiling half v1.6.0
[INFO] [stderr]    Compiling unindent v0.1.7
[INFO] [stderr]    Compiling whoami v1.0.3
[INFO] [stderr]    Compiling oorandom v11.1.3
[INFO] [stderr]    Compiling diff v0.1.12
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]    Compiling dirs-sys v0.3.5
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling plotters v0.2.15
[INFO] [stderr]    Compiling crypto-mac v0.8.0
[INFO] [stderr]    Compiling tinytemplate v1.2.0
[INFO] [stderr]    Compiling serde-hjson v0.9.1
[INFO] [stderr]    Compiling uuid v0.8.1
[INFO] [stderr]    Compiling backoff v0.2.1
[INFO] [stderr]    Compiling blake2 v0.9.1
[INFO] [stderr]    Compiling dirs v3.0.1
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]    Compiling serde_cbor v0.11.1
[INFO] [stderr]    Compiling indoc v1.0.3
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling criterion-plot v0.4.3
[INFO] [stderr]    Compiling config v0.10.1
[INFO] [stderr]    Compiling libz-sys v1.1.2
[INFO] [stderr]    Compiling openssl-sys v0.9.60
[INFO] [stderr]    Compiling libssh2-sys v0.2.20
[INFO] [stderr]    Compiling zstd-sys v1.4.19+zstd.1.4.8
[INFO] [stderr]    Compiling libgit2-sys v0.12.17+1.1.0
[INFO] [stderr]    Compiling protobuf-codegen v2.20.0
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]    Compiling protobuf-codegen-pure v2.20.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.23
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling jujube-lib v0.1.1
[INFO] [stderr]    Compiling thiserror v1.0.23
[INFO] [stderr]    Compiling git2 v0.13.15
[INFO] [stderr]    Compiling criterion v0.3.3
[INFO] [stderr]    Compiling zstd v0.6.0+zstd.1.4.8
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/jujube-lib-0.1.1/src/lib.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(get_mut_unchecked)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `jujube-lib`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "6544870b80b5b962f610c3507d67c83e8d1f751765f189e92cf1b9ad665a9e0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6544870b80b5b962f610c3507d67c83e8d1f751765f189e92cf1b9ad665a9e0d", kill_on_drop: false }`
[INFO] [stdout] 6544870b80b5b962f610c3507d67c83e8d1f751765f189e92cf1b9ad665a9e0d